cpu/o3/regfile.hh - arm/gem5 - Git at Google

 /*
  * Copyright (c) 2004-2005 The Regents of The University of Michigan
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met: redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer;
  * redistributions in binary form must reproduce the above copyright
  * notice, this list of conditions and the following disclaimer in the
  * documentation and/or other materials provided with the distribution;
  * neither the name of the copyright holders nor the names of its
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */

 #ifndef __CPU_O3_CPU_REGFILE_HH__
 #define __CPU_O3_CPU_REGFILE_HH__

 // @todo: Destructor

 #include "arch/alpha/isa_traits.hh"
 #include "base/trace.hh"
 #include "cpu/o3/comm.hh"

 #ifdef FULL_SYSTEM
 #include "arch/alpha/ev5.hh"
 #include "kern/kernel_stats.hh"

 using namespace EV5;
 #endif

 // This really only depends on the ISA, and not the Impl.  It might be nicer
 // to see if I can make it depend on nothing...
 // Things that are in the ifdef FULL_SYSTEM are pretty dependent on the ISA,
 // and should go in the AlphaFullCPU.

 template <class Impl>
 class PhysRegFile
 {
     //Note that most of the definitions of the IntReg, FloatReg, etc. exist
     //within the Impl/ISA class and not within this PhysRegFile class.

     //Will need some way to allow stuff like swap_palshadow to access the
     //correct registers.  Might require code changes to swap_palshadow and
     //other execution contexts.

     //Will make these registers public for now, but they probably should
     //be private eventually with some accessor functions.
   public:
     typedef typename Impl::ISA ISA;
     typedef typename Impl::FullCPU FullCPU;

     PhysRegFile(unsigned _numPhysicalIntRegs,
                 unsigned _numPhysicalFloatRegs);

     //Everything below should be pretty well identical to the normal
     //register file that exists within AlphaISA class.
     //The duplication is unfortunate but it's better than having
     //different ways to access certain registers.

     //Add these in later when everything else is in place
 //    void serialize(std::ostream &os);
 //    void unserialize(Checkpoint *cp, const std::string &section);

     uint64_t readIntReg(PhysRegIndex reg_idx)
     {
         assert(reg_idx < numPhysicalIntRegs);

         DPRINTF(IEW, "RegFile: Access to int register %i, has data "
                 "%i\n", int(reg_idx), intRegFile[reg_idx]);
         return intRegFile[reg_idx];
     }

     float readFloatRegSingle(PhysRegIndex reg_idx)
     {
         // Remove the base Float reg dependency.
         reg_idx = reg_idx - numPhysicalIntRegs;

         assert(reg_idx < numPhysicalFloatRegs + numPhysicalIntRegs);

         DPRINTF(IEW, "RegFile: Access to float register %i as single, has "
                 "data %8.8f\n", int(reg_idx), (float)floatRegFile[reg_idx].d);

         return (float)floatRegFile[reg_idx].d;
     }

     double readFloatRegDouble(PhysRegIndex reg_idx)
     {
         // Remove the base Float reg dependency.
         reg_idx = reg_idx - numPhysicalIntRegs;

         assert(reg_idx < numPhysicalFloatRegs + numPhysicalIntRegs);

         DPRINTF(IEW, "RegFile: Access to float register %i as double, has "
                 " data %8.8f\n", int(reg_idx), floatRegFile[reg_idx].d);

         return floatRegFile[reg_idx].d;
     }

     uint64_t readFloatRegInt(PhysRegIndex reg_idx)
     {
         // Remove the base Float reg dependency.
         reg_idx = reg_idx - numPhysicalIntRegs;

         assert(reg_idx < numPhysicalFloatRegs + numPhysicalIntRegs);

         DPRINTF(IEW, "RegFile: Access to float register %i as int, has data "
                 "%lli\n", int(reg_idx), floatRegFile[reg_idx].q);

         return floatRegFile[reg_idx].q;
     }

     void setIntReg(PhysRegIndex reg_idx, uint64_t val)
     {
         assert(reg_idx < numPhysicalIntRegs);

         DPRINTF(IEW, "RegFile: Setting int register %i to %lli\n",
                 int(reg_idx), val);

         intRegFile[reg_idx] = val;
     }

     void setFloatRegSingle(PhysRegIndex reg_idx, float val)
     {
         // Remove the base Float reg dependency.
         reg_idx = reg_idx - numPhysicalIntRegs;

         assert(reg_idx < numPhysicalFloatRegs + numPhysicalIntRegs);

         DPRINTF(IEW, "RegFile: Setting float register %i to %8.8f\n",
                 int(reg_idx), val);

         floatRegFile[reg_idx].d = (double)val;
     }

     void setFloatRegDouble(PhysRegIndex reg_idx, double val)
     {
         // Remove the base Float reg dependency.
         reg_idx = reg_idx - numPhysicalIntRegs;

         assert(reg_idx < numPhysicalFloatRegs + numPhysicalIntRegs);

         DPRINTF(IEW, "RegFile: Setting float register %i to %8.8f\n",
                 int(reg_idx), val);

         floatRegFile[reg_idx].d = val;
     }

     void setFloatRegInt(PhysRegIndex reg_idx, uint64_t val)
     {
         // Remove the base Float reg dependency.
         reg_idx = reg_idx - numPhysicalIntRegs;

         assert(reg_idx < numPhysicalFloatRegs + numPhysicalIntRegs);

         DPRINTF(IEW, "RegFile: Setting float register %i to %lli\n",
                 int(reg_idx), val);

         floatRegFile[reg_idx].q = val;
     }

     uint64_t readPC()
     {
         return pc;
     }

     void setPC(uint64_t val)
     {
         pc = val;
     }

     void setNextPC(uint64_t val)
     {
         npc = val;
     }

     //Consider leaving this stuff and below in some implementation specific
     //file as opposed to the general register file.  Or have a derived class.
     uint64_t readUniq()
     {
         return miscRegs.uniq;
     }

     void setUniq(uint64_t val)
     {
         miscRegs.uniq = val;
     }

     uint64_t readFpcr()
     {
         return miscRegs.fpcr;
     }

     void setFpcr(uint64_t val)
     {
         miscRegs.fpcr = val;
     }

 #ifdef FULL_SYSTEM
     uint64_t readIpr(int idx, Fault &fault);
     Fault setIpr(int idx, uint64_t val);
     InternalProcReg *getIpr() { return ipr; }
     int readIntrFlag() { return intrflag; }
     void setIntrFlag(int val) { intrflag = val; }
 #endif

     // These should be private eventually, but will be public for now
     // so that I can hack around the initregs issue.
   public:
     /** (signed) integer register file. */
     IntReg *intRegFile;

     /** Floating point register file. */
     FloatReg *floatRegFile;

     /** Miscellaneous register file. */
     MiscRegFile miscRegs;

     /** Program counter. */
     Addr pc;

     /** Next-cycle program counter. */
     Addr npc;

 #ifdef FULL_SYSTEM
   private:
     // This is ISA specifc stuff; remove it eventually once ISAImpl is used
     IntReg palregs[NumIntRegs];	// PAL shadow registers
     InternalProcReg ipr[NumInternalProcRegs]; // internal processor regs
     int intrflag;			// interrupt flag
     bool pal_shadow;		// using pal_shadow registers
 #endif

   private:
     FullCPU *cpu;

   public:
     void setCPU(FullCPU *cpu_ptr) { cpu = cpu_ptr; }

     unsigned numPhysicalIntRegs;
     unsigned numPhysicalFloatRegs;
 };

 template <class Impl>
 PhysRegFile<Impl>::PhysRegFile(unsigned _numPhysicalIntRegs,
                                unsigned _numPhysicalFloatRegs)
     : numPhysicalIntRegs(_numPhysicalIntRegs),
       numPhysicalFloatRegs(_numPhysicalFloatRegs)
 {
     intRegFile = new IntReg[numPhysicalIntRegs];
     floatRegFile = new FloatReg[numPhysicalFloatRegs];

     memset(intRegFile, 0, sizeof(*intRegFile));
     memset(floatRegFile, 0, sizeof(*floatRegFile));
 }

 #ifdef FULL_SYSTEM

 //Problem:  This code doesn't make sense at the RegFile level because it
 //needs things such as the itb and dtb.  Either put it at the CPU level or
 //the DynInst level.
 template <class Impl>
 uint64_t
 PhysRegFile<Impl>::readIpr(int idx, Fault &fault)
 {
     uint64_t retval = 0;    // return value, default 0

     switch (idx) {
       case ISA::IPR_PALtemp0:
       case ISA::IPR_PALtemp1:
       case ISA::IPR_PALtemp2:
       case ISA::IPR_PALtemp3:
       case ISA::IPR_PALtemp4:
       case ISA::IPR_PALtemp5:
       case ISA::IPR_PALtemp6:
       case ISA::IPR_PALtemp7:
       case ISA::IPR_PALtemp8:
       case ISA::IPR_PALtemp9:
       case ISA::IPR_PALtemp10:
       case ISA::IPR_PALtemp11:
       case ISA::IPR_PALtemp12:
       case ISA::IPR_PALtemp13:
       case ISA::IPR_PALtemp14:
       case ISA::IPR_PALtemp15:
       case ISA::IPR_PALtemp16:
       case ISA::IPR_PALtemp17:
       case ISA::IPR_PALtemp18:
       case ISA::IPR_PALtemp19:
       case ISA::IPR_PALtemp20:
       case ISA::IPR_PALtemp21:
       case ISA::IPR_PALtemp22:
       case ISA::IPR_PALtemp23:
       case ISA::IPR_PAL_BASE:

       case ISA::IPR_IVPTBR:
       case ISA::IPR_DC_MODE:
       case ISA::IPR_MAF_MODE:
       case ISA::IPR_ISR:
       case ISA::IPR_EXC_ADDR:
       case ISA::IPR_IC_PERR_STAT:
       case ISA::IPR_DC_PERR_STAT:
       case ISA::IPR_MCSR:
       case ISA::IPR_ASTRR:
       case ISA::IPR_ASTER:
       case ISA::IPR_SIRR:
       case ISA::IPR_ICSR:
       case ISA::IPR_ICM:
       case ISA::IPR_DTB_CM:
       case ISA::IPR_IPLR:
       case ISA::IPR_INTID:
       case ISA::IPR_PMCTR:
         // no side-effect
         retval = ipr[idx];
         break;

       case ISA::IPR_CC:
         retval |= ipr[idx] & ULL(0xffffffff00000000);
         retval |= curTick  & ULL(0x00000000ffffffff);
         break;

       case ISA::IPR_VA:
         retval = ipr[idx];
         break;

       case ISA::IPR_VA_FORM:
       case ISA::IPR_MM_STAT:
       case ISA::IPR_IFAULT_VA_FORM:
       case ISA::IPR_EXC_MASK:
       case ISA::IPR_EXC_SUM:
         retval = ipr[idx];
         break;

       case ISA::IPR_DTB_PTE:
         {
             typename ISA::PTE &pte = cpu->dtb->index(1);

             retval |= ((u_int64_t)pte.ppn & ULL(0x7ffffff)) << 32;
             retval |= ((u_int64_t)pte.xre & ULL(0xf)) << 8;
             retval |= ((u_int64_t)pte.xwe & ULL(0xf)) << 12;
             retval |= ((u_int64_t)pte.fonr & ULL(0x1)) << 1;
             retval |= ((u_int64_t)pte.fonw & ULL(0x1))<< 2;
             retval |= ((u_int64_t)pte.asma & ULL(0x1)) << 4;
             retval |= ((u_int64_t)pte.asn & ULL(0x7f)) << 57;
         }
         break;

         // write only registers
       case ISA::IPR_HWINT_CLR:
       case ISA::IPR_SL_XMIT:
       case ISA::IPR_DC_FLUSH:
       case ISA::IPR_IC_FLUSH:
       case ISA::IPR_ALT_MODE:
       case ISA::IPR_DTB_IA:
       case ISA::IPR_DTB_IAP:
       case ISA::IPR_ITB_IA:
       case ISA::IPR_ITB_IAP:
         fault = Unimplemented_Opcode_Fault;
         break;

       default:
         // invalid IPR
         fault = Unimplemented_Opcode_Fault;
         break;
     }

     return retval;
 }

 extern int break_ipl;

 template <class Impl>
 Fault
 PhysRegFile<Impl>::setIpr(int idx, uint64_t val)
 {
     uint64_t old;

     switch (idx) {
       case ISA::IPR_PALtemp0:
       case ISA::IPR_PALtemp1:
       case ISA::IPR_PALtemp2:
       case ISA::IPR_PALtemp3:
       case ISA::IPR_PALtemp4:
       case ISA::IPR_PALtemp5:
       case ISA::IPR_PALtemp6:
       case ISA::IPR_PALtemp7:
       case ISA::IPR_PALtemp8:
       case ISA::IPR_PALtemp9:
       case ISA::IPR_PALtemp10:
       case ISA::IPR_PALtemp11:
       case ISA::IPR_PALtemp12:
       case ISA::IPR_PALtemp13:
       case ISA::IPR_PALtemp14:
       case ISA::IPR_PALtemp15:
       case ISA::IPR_PALtemp16:
       case ISA::IPR_PALtemp17:
       case ISA::IPR_PALtemp18:
       case ISA::IPR_PALtemp19:
       case ISA::IPR_PALtemp20:
       case ISA::IPR_PALtemp21:
       case ISA::IPR_PALtemp22:
       case ISA::IPR_PAL_BASE:
       case ISA::IPR_IC_PERR_STAT:
       case ISA::IPR_DC_PERR_STAT:
       case ISA::IPR_PMCTR:
         // write entire quad w/ no side-effect
         ipr[idx] = val;
         break;

       case ISA::IPR_CC_CTL:
         // This IPR resets the cycle counter.  We assume this only
         // happens once... let's verify that.
         assert(ipr[idx] == 0);
         ipr[idx] = 1;
         break;

       case ISA::IPR_CC:
         // This IPR only writes the upper 64 bits.  It's ok to write
         // all 64 here since we mask out the lower 32 in rpcc (see
         // isa_desc).
         ipr[idx] = val;
         break;

       case ISA::IPR_PALtemp23:
         // write entire quad w/ no side-effect
         old = ipr[idx];
         ipr[idx] = val;
         break;

       case ISA::IPR_DTB_PTE:
         // write entire quad w/ no side-effect, tag is forthcoming
         ipr[idx] = val;
         break;

       case ISA::IPR_EXC_ADDR:
         // second least significant bit in PC is always zero
         ipr[idx] = val & ~2;
         break;

       case ISA::IPR_ASTRR:
       case ISA::IPR_ASTER:
         // only write least significant four bits - privilege mask
         ipr[idx] = val & 0xf;
         break;

       case ISA::IPR_IPLR:
         // only write least significant five bits - interrupt level
         ipr[idx] = val & 0x1f;
         break;

       case ISA::IPR_DTB_CM:

       case ISA::IPR_ICM:
         // only write two mode bits - processor mode
         ipr[idx] = val & 0x18;
         break;

       case ISA::IPR_ALT_MODE:
         // only write two mode bits - processor mode
         ipr[idx] = val & 0x18;
         break;

       case ISA::IPR_MCSR:
         // more here after optimization...
         ipr[idx] = val;
         break;

       case ISA::IPR_SIRR:
         // only write software interrupt mask
         ipr[idx] = val & 0x7fff0;
         break;

       case ISA::IPR_ICSR:
         ipr[idx] = val & ULL(0xffffff0300);
         break;

       case ISA::IPR_IVPTBR:
       case ISA::IPR_MVPTBR:
         ipr[idx] = val & ULL(0xffffffffc0000000);
         break;

       case ISA::IPR_DC_TEST_CTL:
         ipr[idx] = val & 0x1ffb;
         break;

       case ISA::IPR_DC_MODE:
       case ISA::IPR_MAF_MODE:
         ipr[idx] = val & 0x3f;
         break;

       case ISA::IPR_ITB_ASN:
         ipr[idx] = val & 0x7f0;
         break;

       case ISA::IPR_DTB_ASN:
         ipr[idx] = val & ULL(0xfe00000000000000);
         break;

       case ISA::IPR_EXC_SUM:
       case ISA::IPR_EXC_MASK:
         // any write to this register clears it
         ipr[idx] = 0;
         break;

       case ISA::IPR_INTID:
       case ISA::IPR_SL_RCV:
       case ISA::IPR_MM_STAT:
       case ISA::IPR_ITB_PTE_TEMP:
       case ISA::IPR_DTB_PTE_TEMP:
         // read-only registers
         return Unimplemented_Opcode_Fault;

       case ISA::IPR_HWINT_CLR:
       case ISA::IPR_SL_XMIT:
       case ISA::IPR_DC_FLUSH:
       case ISA::IPR_IC_FLUSH:
         // the following are write only
         ipr[idx] = val;
         break;

       case ISA::IPR_DTB_IA:
         // really a control write
         ipr[idx] = 0;

         cpu->dtb->flushAll();
         break;

       case ISA::IPR_DTB_IAP:
         // really a control write
         ipr[idx] = 0;

         cpu->dtb->flushProcesses();
         break;

       case ISA::IPR_DTB_IS:
         // really a control write
         ipr[idx] = val;

         cpu->dtb->flushAddr(val, DTB_ASN_ASN(ipr[ISA::IPR_DTB_ASN]));
         break;

       case ISA::IPR_DTB_TAG: {
           struct ISA::PTE pte;

           // FIXME: granularity hints NYI...
           if (DTB_PTE_GH(ipr[ISA::IPR_DTB_PTE]) != 0)
               panic("PTE GH field != 0");

           // write entire quad
           ipr[idx] = val;

           // construct PTE for new entry
           pte.ppn = DTB_PTE_PPN(ipr[ISA::IPR_DTB_PTE]);
           pte.xre = DTB_PTE_XRE(ipr[ISA::IPR_DTB_PTE]);
           pte.xwe = DTB_PTE_XWE(ipr[ISA::IPR_DTB_PTE]);
           pte.fonr = DTB_PTE_FONR(ipr[ISA::IPR_DTB_PTE]);
           pte.fonw = DTB_PTE_FONW(ipr[ISA::IPR_DTB_PTE]);
           pte.asma = DTB_PTE_ASMA(ipr[ISA::IPR_DTB_PTE]);
           pte.asn = DTB_ASN_ASN(ipr[ISA::IPR_DTB_ASN]);

           // insert new TAG/PTE value into data TLB
           cpu->dtb->insert(val, pte);
       }
         break;

       case ISA::IPR_ITB_PTE: {
           struct ISA::PTE pte;

           // FIXME: granularity hints NYI...
           if (ITB_PTE_GH(val) != 0)
               panic("PTE GH field != 0");

           // write entire quad
           ipr[idx] = val;

           // construct PTE for new entry
           pte.ppn = ITB_PTE_PPN(val);
           pte.xre = ITB_PTE_XRE(val);
           pte.xwe = 0;
           pte.fonr = ITB_PTE_FONR(val);
           pte.fonw = ITB_PTE_FONW(val);
           pte.asma = ITB_PTE_ASMA(val);
           pte.asn = ITB_ASN_ASN(ipr[ISA::IPR_ITB_ASN]);

           // insert new TAG/PTE value into data TLB
           cpu->itb->insert(ipr[ISA::IPR_ITB_TAG], pte);
       }
         break;

       case ISA::IPR_ITB_IA:
         // really a control write
         ipr[idx] = 0;

         cpu->itb->flushAll();
         break;

       case ISA::IPR_ITB_IAP:
         // really a control write
         ipr[idx] = 0;

         cpu->itb->flushProcesses();
         break;

       case ISA::IPR_ITB_IS:
         // really a control write
         ipr[idx] = val;

         cpu->itb->flushAddr(val, ITB_ASN_ASN(ipr[ISA::IPR_ITB_ASN]));
         break;

       default:
         // invalid IPR
         return Unimplemented_Opcode_Fault;
     }

     // no error...
     return No_Fault;
 }

 #endif // #ifdef FULL_SYSTEM

 #endif // __CPU_O3_CPU_REGFILE_HH__
	/*
	* Copyright (c) 2004-2005 The Regents of The University of Michigan
	* All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions are
	* met: redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer;
	* redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in the
	* documentation and/or other materials provided with the distribution;
	* neither the name of the copyright holders nor the names of its
	* contributors may be used to endorse or promote products derived from
	* this software without specific prior written permission.
	*
	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*/

	#ifndef __CPU_O3_CPU_REGFILE_HH__
	#define __CPU_O3_CPU_REGFILE_HH__

	// @todo: Destructor

	#include "arch/alpha/isa_traits.hh"
	#include "base/trace.hh"
	#include "cpu/o3/comm.hh"

	#ifdef FULL_SYSTEM
	#include "arch/alpha/ev5.hh"
	#include "kern/kernel_stats.hh"

	using namespace EV5;
	#endif

	// This really only depends on the ISA, and not the Impl. It might be nicer
	// to see if I can make it depend on nothing...
	// Things that are in the ifdef FULL_SYSTEM are pretty dependent on the ISA,
	// and should go in the AlphaFullCPU.

	template <class Impl>
	class PhysRegFile
	{
	//Note that most of the definitions of the IntReg, FloatReg, etc. exist
	//within the Impl/ISA class and not within this PhysRegFile class.

	//Will need some way to allow stuff like swap_palshadow to access the
	//correct registers. Might require code changes to swap_palshadow and
	//other execution contexts.

	//Will make these registers public for now, but they probably should
	//be private eventually with some accessor functions.
	public:
	typedef typename Impl::ISA ISA;
	typedef typename Impl::FullCPU FullCPU;

	PhysRegFile(unsigned _numPhysicalIntRegs,
	unsigned _numPhysicalFloatRegs);

	//Everything below should be pretty well identical to the normal
	//register file that exists within AlphaISA class.
	//The duplication is unfortunate but it's better than having
	//different ways to access certain registers.

	//Add these in later when everything else is in place
	// void serialize(std::ostream &os);
	// void unserialize(Checkpoint *cp, const std::string &section);

	uint64_t readIntReg(PhysRegIndex reg_idx)
	{
	assert(reg_idx < numPhysicalIntRegs);

	DPRINTF(IEW, "RegFile: Access to int register %i, has data "
	"%i\n", int(reg_idx), intRegFile[reg_idx]);
	return intRegFile[reg_idx];
	}

	float readFloatRegSingle(PhysRegIndex reg_idx)
	{
	// Remove the base Float reg dependency.
	reg_idx = reg_idx - numPhysicalIntRegs;

	assert(reg_idx < numPhysicalFloatRegs + numPhysicalIntRegs);

	DPRINTF(IEW, "RegFile: Access to float register %i as single, has "
	"data %8.8f\n", int(reg_idx), (float)floatRegFile[reg_idx].d);

	return (float)floatRegFile[reg_idx].d;
	}

	double readFloatRegDouble(PhysRegIndex reg_idx)
	{
	// Remove the base Float reg dependency.
	reg_idx = reg_idx - numPhysicalIntRegs;

	assert(reg_idx < numPhysicalFloatRegs + numPhysicalIntRegs);

	DPRINTF(IEW, "RegFile: Access to float register %i as double, has "
	" data %8.8f\n", int(reg_idx), floatRegFile[reg_idx].d);

	return floatRegFile[reg_idx].d;
	}

	uint64_t readFloatRegInt(PhysRegIndex reg_idx)
	{
	// Remove the base Float reg dependency.
	reg_idx = reg_idx - numPhysicalIntRegs;

	assert(reg_idx < numPhysicalFloatRegs + numPhysicalIntRegs);

	DPRINTF(IEW, "RegFile: Access to float register %i as int, has data "
	"%lli\n", int(reg_idx), floatRegFile[reg_idx].q);

	return floatRegFile[reg_idx].q;
	}

	void setIntReg(PhysRegIndex reg_idx, uint64_t val)
	{
	assert(reg_idx < numPhysicalIntRegs);

	DPRINTF(IEW, "RegFile: Setting int register %i to %lli\n",
	int(reg_idx), val);

	intRegFile[reg_idx] = val;
	}

	void setFloatRegSingle(PhysRegIndex reg_idx, float val)
	{
	// Remove the base Float reg dependency.
	reg_idx = reg_idx - numPhysicalIntRegs;

	assert(reg_idx < numPhysicalFloatRegs + numPhysicalIntRegs);

	DPRINTF(IEW, "RegFile: Setting float register %i to %8.8f\n",
	int(reg_idx), val);

	floatRegFile[reg_idx].d = (double)val;
	}

	void setFloatRegDouble(PhysRegIndex reg_idx, double val)
	{
	// Remove the base Float reg dependency.
	reg_idx = reg_idx - numPhysicalIntRegs;

	assert(reg_idx < numPhysicalFloatRegs + numPhysicalIntRegs);

	DPRINTF(IEW, "RegFile: Setting float register %i to %8.8f\n",
	int(reg_idx), val);

	floatRegFile[reg_idx].d = val;
	}

	void setFloatRegInt(PhysRegIndex reg_idx, uint64_t val)
	{
	// Remove the base Float reg dependency.
	reg_idx = reg_idx - numPhysicalIntRegs;

	assert(reg_idx < numPhysicalFloatRegs + numPhysicalIntRegs);

	DPRINTF(IEW, "RegFile: Setting float register %i to %lli\n",
	int(reg_idx), val);

	floatRegFile[reg_idx].q = val;
	}

	uint64_t readPC()
	{
	return pc;
	}

	void setPC(uint64_t val)
	{
	pc = val;
	}

	void setNextPC(uint64_t val)
	{
	npc = val;
	}

	//Consider leaving this stuff and below in some implementation specific
	//file as opposed to the general register file. Or have a derived class.
	uint64_t readUniq()
	{
	return miscRegs.uniq;
	}

	void setUniq(uint64_t val)
	{
	miscRegs.uniq = val;
	}

	uint64_t readFpcr()
	{
	return miscRegs.fpcr;
	}

	void setFpcr(uint64_t val)
	{
	miscRegs.fpcr = val;
	}

	#ifdef FULL_SYSTEM
	uint64_t readIpr(int idx, Fault &fault);
	Fault setIpr(int idx, uint64_t val);
	InternalProcReg *getIpr() { return ipr; }
	int readIntrFlag() { return intrflag; }
	void setIntrFlag(int val) { intrflag = val; }
	#endif

	// These should be private eventually, but will be public for now
	// so that I can hack around the initregs issue.
	public:
	/** (signed) integer register file. */
	IntReg *intRegFile;

	/** Floating point register file. */
	FloatReg *floatRegFile;

	/** Miscellaneous register file. */
	MiscRegFile miscRegs;

	/** Program counter. */
	Addr pc;

	/** Next-cycle program counter. */
	Addr npc;

	#ifdef FULL_SYSTEM
	private:
	// This is ISA specifc stuff; remove it eventually once ISAImpl is used
	IntReg palregs[NumIntRegs]; // PAL shadow registers
	InternalProcReg ipr[NumInternalProcRegs]; // internal processor regs
	int intrflag; // interrupt flag
	bool pal_shadow; // using pal_shadow registers
	#endif

	private:
	FullCPU *cpu;

	public:
	void setCPU(FullCPU *cpu_ptr) { cpu = cpu_ptr; }

	unsigned numPhysicalIntRegs;
	unsigned numPhysicalFloatRegs;
	};

	template <class Impl>
	PhysRegFile<Impl>::PhysRegFile(unsigned _numPhysicalIntRegs,
	unsigned _numPhysicalFloatRegs)
	: numPhysicalIntRegs(_numPhysicalIntRegs),
	numPhysicalFloatRegs(_numPhysicalFloatRegs)
	{
	intRegFile = new IntReg[numPhysicalIntRegs];
	floatRegFile = new FloatReg[numPhysicalFloatRegs];

	memset(intRegFile, 0, sizeof(*intRegFile));
	memset(floatRegFile, 0, sizeof(*floatRegFile));
	}

	#ifdef FULL_SYSTEM

	//Problem: This code doesn't make sense at the RegFile level because it
	//needs things such as the itb and dtb. Either put it at the CPU level or
	//the DynInst level.
	template <class Impl>
	uint64_t
	PhysRegFile<Impl>::readIpr(int idx, Fault &fault)
	{
	uint64_t retval = 0; // return value, default 0

	switch (idx) {
	case ISA::IPR_PALtemp0:
	case ISA::IPR_PALtemp1:
	case ISA::IPR_PALtemp2:
	case ISA::IPR_PALtemp3:
	case ISA::IPR_PALtemp4:
	case ISA::IPR_PALtemp5:
	case ISA::IPR_PALtemp6:
	case ISA::IPR_PALtemp7:
	case ISA::IPR_PALtemp8:
	case ISA::IPR_PALtemp9:
	case ISA::IPR_PALtemp10:
	case ISA::IPR_PALtemp11:
	case ISA::IPR_PALtemp12:
	case ISA::IPR_PALtemp13:
	case ISA::IPR_PALtemp14:
	case ISA::IPR_PALtemp15:
	case ISA::IPR_PALtemp16:
	case ISA::IPR_PALtemp17:
	case ISA::IPR_PALtemp18:
	case ISA::IPR_PALtemp19:
	case ISA::IPR_PALtemp20:
	case ISA::IPR_PALtemp21:
	case ISA::IPR_PALtemp22:
	case ISA::IPR_PALtemp23:
	case ISA::IPR_PAL_BASE:

	case ISA::IPR_IVPTBR:
	case ISA::IPR_DC_MODE:
	case ISA::IPR_MAF_MODE:
	case ISA::IPR_ISR:
	case ISA::IPR_EXC_ADDR:
	case ISA::IPR_IC_PERR_STAT:
	case ISA::IPR_DC_PERR_STAT:
	case ISA::IPR_MCSR:
	case ISA::IPR_ASTRR:
	case ISA::IPR_ASTER:
	case ISA::IPR_SIRR:
	case ISA::IPR_ICSR:
	case ISA::IPR_ICM:
	case ISA::IPR_DTB_CM:
	case ISA::IPR_IPLR:
	case ISA::IPR_INTID:
	case ISA::IPR_PMCTR:
	// no side-effect
	retval = ipr[idx];
	break;

	case ISA::IPR_CC:
	retval \|= ipr[idx] & ULL(0xffffffff00000000);
	retval \|= curTick & ULL(0x00000000ffffffff);
	break;

	case ISA::IPR_VA:
	retval = ipr[idx];
	break;

	case ISA::IPR_VA_FORM:
	case ISA::IPR_MM_STAT:
	case ISA::IPR_IFAULT_VA_FORM:
	case ISA::IPR_EXC_MASK:
	case ISA::IPR_EXC_SUM:
	retval = ipr[idx];
	break;

	case ISA::IPR_DTB_PTE:
	{
	typename ISA::PTE &pte = cpu->dtb->index(1);

	retval \|= ((u_int64_t)pte.ppn & ULL(0x7ffffff)) << 32;
	retval \|= ((u_int64_t)pte.xre & ULL(0xf)) << 8;
	retval \|= ((u_int64_t)pte.xwe & ULL(0xf)) << 12;
	retval \|= ((u_int64_t)pte.fonr & ULL(0x1)) << 1;
	retval \|= ((u_int64_t)pte.fonw & ULL(0x1))<< 2;
	retval \|= ((u_int64_t)pte.asma & ULL(0x1)) << 4;
	retval \|= ((u_int64_t)pte.asn & ULL(0x7f)) << 57;
	}
	break;

	// write only registers
	case ISA::IPR_HWINT_CLR:
	case ISA::IPR_SL_XMIT:
	case ISA::IPR_DC_FLUSH:
	case ISA::IPR_IC_FLUSH:
	case ISA::IPR_ALT_MODE:
	case ISA::IPR_DTB_IA:
	case ISA::IPR_DTB_IAP:
	case ISA::IPR_ITB_IA:
	case ISA::IPR_ITB_IAP:
	fault = Unimplemented_Opcode_Fault;
	break;

	default:
	// invalid IPR
	fault = Unimplemented_Opcode_Fault;
	break;
	}

	return retval;
	}

	extern int break_ipl;

	template <class Impl>
	Fault
	PhysRegFile<Impl>::setIpr(int idx, uint64_t val)
	{
	uint64_t old;

	switch (idx) {
	case ISA::IPR_PALtemp0:
	case ISA::IPR_PALtemp1:
	case ISA::IPR_PALtemp2:
	case ISA::IPR_PALtemp3:
	case ISA::IPR_PALtemp4:
	case ISA::IPR_PALtemp5:
	case ISA::IPR_PALtemp6:
	case ISA::IPR_PALtemp7:
	case ISA::IPR_PALtemp8:
	case ISA::IPR_PALtemp9:
	case ISA::IPR_PALtemp10:
	case ISA::IPR_PALtemp11:
	case ISA::IPR_PALtemp12:
	case ISA::IPR_PALtemp13:
	case ISA::IPR_PALtemp14:
	case ISA::IPR_PALtemp15:
	case ISA::IPR_PALtemp16:
	case ISA::IPR_PALtemp17:
	case ISA::IPR_PALtemp18:
	case ISA::IPR_PALtemp19:
	case ISA::IPR_PALtemp20:
	case ISA::IPR_PALtemp21:
	case ISA::IPR_PALtemp22:
	case ISA::IPR_PAL_BASE:
	case ISA::IPR_IC_PERR_STAT:
	case ISA::IPR_DC_PERR_STAT:
	case ISA::IPR_PMCTR:
	// write entire quad w/ no side-effect
	ipr[idx] = val;
	break;

	case ISA::IPR_CC_CTL:
	// This IPR resets the cycle counter. We assume this only
	// happens once... let's verify that.
	assert(ipr[idx] == 0);
	ipr[idx] = 1;
	break;

	case ISA::IPR_CC:
	// This IPR only writes the upper 64 bits. It's ok to write
	// all 64 here since we mask out the lower 32 in rpcc (see
	// isa_desc).
	ipr[idx] = val;
	break;

	case ISA::IPR_PALtemp23:
	// write entire quad w/ no side-effect
	old = ipr[idx];
	ipr[idx] = val;
	break;

	case ISA::IPR_DTB_PTE:
	// write entire quad w/ no side-effect, tag is forthcoming
	ipr[idx] = val;
	break;

	case ISA::IPR_EXC_ADDR:
	// second least significant bit in PC is always zero
	ipr[idx] = val & ~2;
	break;

	case ISA::IPR_ASTRR:
	case ISA::IPR_ASTER:
	// only write least significant four bits - privilege mask
	ipr[idx] = val & 0xf;
	break;

	case ISA::IPR_IPLR:
	// only write least significant five bits - interrupt level
	ipr[idx] = val & 0x1f;
	break;

	case ISA::IPR_DTB_CM:

	case ISA::IPR_ICM:
	// only write two mode bits - processor mode
	ipr[idx] = val & 0x18;
	break;

	case ISA::IPR_ALT_MODE:
	// only write two mode bits - processor mode
	ipr[idx] = val & 0x18;
	break;

	case ISA::IPR_MCSR:
	// more here after optimization...
	ipr[idx] = val;
	break;

	case ISA::IPR_SIRR:
	// only write software interrupt mask
	ipr[idx] = val & 0x7fff0;
	break;

	case ISA::IPR_ICSR:
	ipr[idx] = val & ULL(0xffffff0300);
	break;

	case ISA::IPR_IVPTBR:
	case ISA::IPR_MVPTBR:
	ipr[idx] = val & ULL(0xffffffffc0000000);
	break;

	case ISA::IPR_DC_TEST_CTL:
	ipr[idx] = val & 0x1ffb;
	break;

	case ISA::IPR_DC_MODE:
	case ISA::IPR_MAF_MODE:
	ipr[idx] = val & 0x3f;
	break;

	case ISA::IPR_ITB_ASN:
	ipr[idx] = val & 0x7f0;
	break;

	case ISA::IPR_DTB_ASN:
	ipr[idx] = val & ULL(0xfe00000000000000);
	break;

	case ISA::IPR_EXC_SUM:
	case ISA::IPR_EXC_MASK:
	// any write to this register clears it
	ipr[idx] = 0;
	break;

	case ISA::IPR_INTID:
	case ISA::IPR_SL_RCV:
	case ISA::IPR_MM_STAT:
	case ISA::IPR_ITB_PTE_TEMP:
	case ISA::IPR_DTB_PTE_TEMP:
	// read-only registers
	return Unimplemented_Opcode_Fault;

	case ISA::IPR_HWINT_CLR:
	case ISA::IPR_SL_XMIT:
	case ISA::IPR_DC_FLUSH:
	case ISA::IPR_IC_FLUSH:
	// the following are write only
	ipr[idx] = val;
	break;

	case ISA::IPR_DTB_IA:
	// really a control write
	ipr[idx] = 0;

	cpu->dtb->flushAll();
	break;

	case ISA::IPR_DTB_IAP:
	// really a control write
	ipr[idx] = 0;

	cpu->dtb->flushProcesses();
	break;

	case ISA::IPR_DTB_IS:
	// really a control write
	ipr[idx] = val;

	cpu->dtb->flushAddr(val, DTB_ASN_ASN(ipr[ISA::IPR_DTB_ASN]));
	break;

	case ISA::IPR_DTB_TAG: {
	struct ISA::PTE pte;

	// FIXME: granularity hints NYI...
	if (DTB_PTE_GH(ipr[ISA::IPR_DTB_PTE]) != 0)
	panic("PTE GH field != 0");

	// write entire quad
	ipr[idx] = val;

	// construct PTE for new entry
	pte.ppn = DTB_PTE_PPN(ipr[ISA::IPR_DTB_PTE]);
	pte.xre = DTB_PTE_XRE(ipr[ISA::IPR_DTB_PTE]);
	pte.xwe = DTB_PTE_XWE(ipr[ISA::IPR_DTB_PTE]);
	pte.fonr = DTB_PTE_FONR(ipr[ISA::IPR_DTB_PTE]);
	pte.fonw = DTB_PTE_FONW(ipr[ISA::IPR_DTB_PTE]);
	pte.asma = DTB_PTE_ASMA(ipr[ISA::IPR_DTB_PTE]);
	pte.asn = DTB_ASN_ASN(ipr[ISA::IPR_DTB_ASN]);

	// insert new TAG/PTE value into data TLB
	cpu->dtb->insert(val, pte);
	}
	break;

	case ISA::IPR_ITB_PTE: {
	struct ISA::PTE pte;

	// FIXME: granularity hints NYI...
	if (ITB_PTE_GH(val) != 0)
	panic("PTE GH field != 0");

	// write entire quad
	ipr[idx] = val;

	// construct PTE for new entry
	pte.ppn = ITB_PTE_PPN(val);
	pte.xre = ITB_PTE_XRE(val);
	pte.xwe = 0;
	pte.fonr = ITB_PTE_FONR(val);
	pte.fonw = ITB_PTE_FONW(val);
	pte.asma = ITB_PTE_ASMA(val);
	pte.asn = ITB_ASN_ASN(ipr[ISA::IPR_ITB_ASN]);

	// insert new TAG/PTE value into data TLB
	cpu->itb->insert(ipr[ISA::IPR_ITB_TAG], pte);
	}
	break;

	case ISA::IPR_ITB_IA:
	// really a control write
	ipr[idx] = 0;

	cpu->itb->flushAll();
	break;

	case ISA::IPR_ITB_IAP:
	// really a control write
	ipr[idx] = 0;

	cpu->itb->flushProcesses();
	break;

	case ISA::IPR_ITB_IS:
	// really a control write
	ipr[idx] = val;

	cpu->itb->flushAddr(val, ITB_ASN_ASN(ipr[ISA::IPR_ITB_ASN]));
	break;

	default:
	// invalid IPR
	return Unimplemented_Opcode_Fault;
	}

	// no error...
	return No_Fault;
	}

	#endif // #ifdef FULL_SYSTEM

	#endif // __CPU_O3_CPU_REGFILE_HH__